bit drag

常见例句

Laboratory study of drag bit blade wearing rate has been carried out on a medium size test rig under surface drilling condition.
本文從刮刀鑽頭幾何學和摩擦功等原理出發，推導出了鑽頭刀翼高度磨損速度方程。
And just as their long, heavy trains pose a burden to peacocks, the extravagant feathers of Anchiornis may have been a bit of a drag, literally.
對於雄孔雀來說，碩長且沉重的尾屏是個沉重的負擔，而過多的羽毛可能也同樣拖累了近鳥龍。
The bit is usually a drag bit fitted with either PDC or natural diamond cutting structures, but the core bit is unusual in that it has a hole in its center.
鑽頭通常屬於刮刀型，裝備有PDC 或者天然金剛石切削齒，但取芯鑽頭的特別之処在於鑽頭中心有一孔。
www.infopetro.com.cn

Doing that while running to keep up with the crowd could be a bit of a drag.
ECONOMIST: A die-hard analog photographer goes digital
This combined with the lag in the population of the guide, makes it a bit of a drag to use.
ENGADGET: App Review: TiVo Premiere for iPad
Having to manually reconnect each time is a bit of a drag, but probably better than the battery drain you'd get by leaving Bluetooth constantly on.
ENGADGET: ContourGPS Connect View app hands-on Hands-on